Molding-machine.



E. A. PRIDMORE.

MOLDING MACHINE. APPucmou FIILED ocT.29. 1914.

Patented July 1l, 1916.

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E. A. PRIDMORE.

MOLDING MACHINE.

APPLICATION msn ocr. 29. 1914.

1,190,951; Patented July11,1916.

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E. A. PRmMoRL MOLDING MACHINE.

APPLICATION FILED OCT. 29.1914. A 1,1 90,951. Patented July 11, 1916.

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MOLDING-MACHINE.

Specification of Letters Patent.

Patented July 11, 1916.

Application filed October 29, 1914. Serial No. 869,210.

To all whom t may concern:

Be it known that I, EDWARD A. Pim MORE, a citizen of the United States, residing at La Grange, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Molding-Machines, of which the following is a specification.

My invention relates to molding machines of the variety involving a pattern-carrier mounted to be turned from one position in which the mold is rammed, to a position in which the mold is separated from the pattern, and more particularly to that variety of machines wherein j arring-mechanism is provided at the ramming side of the .machine for jarring the mold preparatory to inverting the latter, and in which the part carrying the pattern is releasable from the pattern-carrier and when in ramming position, is released from the carrier, and the parts of the machine so arranged that the part carrying the pattern will be spaced at all times during the arring operation from the carrier and not permitted to strike the latter.

Where the part carrying the pattern is normally spaced from the pattern-carrier during the jarring operation, as above' stated, the initial movement of the patterncarrier inv moving to inverted position serves to cause the pattern-carrier to move from its normal spaced relation to the part carrying the pattern, to a position in which it cont-acts with the under side of said part, thus closingthe gap between these two members. Vhere-the clampsvfor the flasks', bottom-board and pattern-plate do not engage the pattern-carrier, the position of the part carrying the pattern, relative to the carrier, is of no consequence; but where it is desired to use a clamp which is connected with the pattern-carrier, this condition is of considerable importance as any change in the relation of these parts to each other after the clamp is adjusted' destroys the desired adjustment o-f the clamp.

As machines` of this variety have hitherto. been constructed, flask-clamps connected with the carrier have been impracticable as the clamps were required to be applied to the flask when the machine was in a position in which the pattern-carrier was spaced from the part carrying the pattern', and thus the adjustment of the clamps was ineffective for securing the proper clamping of the parts owing to the initial move ment of the patterncarrier being independent of the flask in -the turn-over'operatlon.

My object is to pro-vide means whereby, after the mold has been formed, the pattern-carrier may be moved into engagement with the part carrying the pattern and liaskfto close the gap between these parts, and a clamp or clamps then applied to hold the pattern, flask and bottom-board in position on the pattern-carrier, by engagement withy said carrier.

I` have devised my improvement for use more particularly .inf connection with machines of the marginally-hinged type, and have therefore illustrated it in this connection in the drawings, the general construction of the machine shown being the same as that illustrated and described in my pending application for U. S. Patent. Ser. No. 862,449, led September 19, 1914.

Referring to the accompanying drawings, Figure 1 is a view in side elevation ofv a machine of the marginally-hinged type employing jarring mechanism at the ramming side of thev machine, with provision for releasably locking the part which carries the pattern, to the Y pattern-carrier, and embodying my improvement, the machine being shown in ramming position; Fig. 2 is a view similar to Fig. l, of certain of the parts therein shown, some of the parts being shown in elevation, others in section,"

and some broken away,y the parts of the machine being shown inthe positions they assume after the pattern-carrier has been lifted into engagement with the part that carries the pattern and the flask-clamp has been applied; Fig. 3 is a plan view of the construction sho-wn in Fig. 2; Fig. 4 is a.

section taken at the line 4 on Fig. l and viewed in the direction of the arrow; Fig. 5 is a section taken at the line 5 on Fig. 1 and viewed in the direction of the arrow; and Fig. 6, a section taken at the line 6 on Fig. 5 and viewed in the direction 'of the arrow. w

As hereinbefore stated, the machinein connection with which I havechosen to illustrate my improvement is of the variety illustrated and described in my said pending application, and therefore a general description only ofthe machine illustrated will suliice. The bed ofthe machine is represented at 7 thisbed carrying spaced uprights 8 in which a shaft 9 is journaled.

The shaft 9 is connected with the upwardlyextending arms 10 of a pattern-carrier 11 which is adapted to be swung at the hinge 9 from the ramming position represented in Fig. 1, wherein it is held in horizontal position by resting upon standards 12 secured to the bed 7, to pattern-drawing position at the oppo-site side of the machine wherein the flask is delivered to flask-receiving devices 13 mounted on a piston (not shown) operating in a cylinder 14, the raising and lowering of the flask-receiving devices 13, by raising and lowering the piston carrying them, being effected through the introduction into, and the exhaust from, the cylinder 14 of fluid-pressure applied to the cylinder, the pattern-carrier, when swung from the posi- 'tion shown in Fig. 1 in a clockwise direction to drawing position, engaging at lugs 15 thereon with stops 8a on the uprights 8, which serve to hold the pattern-carrier at right angles to the path of movement of the piston carrying the flask-receiving devices 13 for effecting a straight-line draw. The pattern-carrier is connected at a crank-extension 16 thereon lwith the rod 17 of a piston (not shown) operating in a cylinder 18 trunnioned, as indicated at 19, to the uprights 8, means being provided for supplying fluid-pressure to the cylinder 18 and exhausting it therefrom for swinging the carrier from one of the said positions to the other, and vice versa. The pattern-carrier 11 'is provided at its horizontal `portion with an opening 20 in which the jarring mechanism is located, this mechanism comprising, generally stated, an upright cylinder 21 provided with valve means (not shown) in a casing 22 for controlling the introduction of fluid-pressure into the cylinder 21 and the exhaust of the same from -this cylinder, and a piston 23 reciprocable in the cylinder 21 and having an expanded head 24, the piston 23 seating at a shoulder 25 thereon against the upper end of the cylinder 21, this mechanism operating to lift the piston 23 and thereafter permit it to quickly descend by gravity and by striking at its shoulder 25 against the upper end of the cylinder 21, jar the mold hereinafter referred to, this being repeatedly performed until the necessary jarring has been accomplished.

In the arrangement illustrated, the pattern (not shown) is carried by the board 26a, this board surmounting a plate 26 to which it is connected, as by screws 27, the flask represented at 28, when in ramming position, resting upon the board 25 (Fig. 1). The plate 26, when the pattern-carrier is in the position illustrated in Fig. 1, rests entirely upon the piston 23, in practice the space which is preserved between the plate 26 and the pattern-carrier 11 being approximately one-quarter inch, this space being provided, as it is not desirable that the plate 26 strike the pattern-carrier during the arring operation.

In order that the plate 26 shall be properly guided when jarred by the jarringmechanism hereinbefore referred to, and be releasably connected with the patterncarrier for eHecting the inversion of the flask, the following-described mechanisms are provided. The plate 26 which extends above the pattern-carrier 11 in overlapping relation, as illustrated in Figs. 11 and 5, is provided with depending pins 29 which extend through openings 30 in the carrier 11, these pins serving to guide the plate in the jarring operation. The sides of the pins 29 contain notches 31 adapted to coperate with blocks 32 provided on bars 33 mounted at opposite sides of the carrier to slide lengthwise in bearings 34: on the patterncarrier, the blocks 32, when drawn into the recesses 31, serving to lock the plate 26 and the parts carried thereby, to' the patterncarrier.

In the construction shown, the locking` operation just described and the releasing operation are performed automatically through the medium of levers 35 pivoted at 36 to the arms of the pattern-carrier. The lower end of each lever 35 is pivotally connected with one end of the adjacent bar 33, the upper end of each lever 35 carrying a roller 37 adapted to roll against a cam 38, when the pattern-carrier is inverted, there being one of these cam-s 38 on each of the standards 8. The construction and arrangement of the parts is such that during the initial turning of the pattern-carrier from the position illustrated in Fig. 1 to the right in this figure for delivering the flask to pattern-drawing position,i the levers 35 Awill be rocked in an anti-clockwise direction in Fig. 1, thereby drawing the blocks 32 into the recesses 31, which locks the plate 26 to the pattern-carrier 11, the levers 35 being maintained in position for holding the blocks in said recesses, as described throughout the movement of the pattern-carrier to pattern-drawing position, and back almost to final position for ramming when the pattern-carrier is swung in a reverse direction from pattern-drawing position, abutments 39 on the uprights 8 and interposed in the path of movement of the levers 35 serving to shift the bars 33 to the left in Fig. 1 for withdrawing the blocks 32 from the recesses 31, in the final movement of the patterncarrier to ramming position, it being understood from the foregoing that in the preferred construction of machine illustrated,

the part carrying the pattern is free to be matically locked together during the turning of the pattern-carrier to pattern-drawing position and automatically released upon returning the pattern-carrier to ramming position. v

The parts of the machine, in so far as above described, and the operation of the same, are the same as those illustrated and described in my said pending application, and it is therefore thought that the foregoing general description will sufhce to render clear an understanding of the machine.

My present improvement consists in the lifting of the pattern-carrier to a position in which it will move upwardly into engagement with the under side of the plate 26, thus closing the gap between these parts; and providing means for clamping the flask 28 and the bottom-board 40, which is applied to the top of the flask after the latter has been rammed and the sand struck olf, to the plate 25, through the medium of a clamp or clamps which operatively engage the pattern-carrier.

In the preferred form of my invention, illustrated in the drawings, I employ fluidpressure operated means for lifting the carrier 11 for the purpose hereinbefore stated, these means in the structure shown comprising a stationary piston 41 at each side of the machine, cylinders 42 closed at their upper ends and slidable on said pistons, and arranged immediately beneath the patterncarrier, each cylinder being provided internally with a shoulder 43 to limit its downward movement on the piston, and a pipe 44 for introducing fluid-pressure into each cylinder 42 and exhausting the same therefrom, this pipe in practice being equipped with a two-way valve whereby fluid-pressure from any suitable source may be caused to enter the cylinder when the valve is in one position and exhaust from the cylinder when the valve is in another position, the latter operation for permitting the cylinder 42 to descend.

In the operation of the machine the operator rst opens the cylinders 42 to the fluidpressure which causes these cylinders to rise until arrested by stops 45 on the pistons with which the lower walls of slots 45 in the cylinders 42 engage, the cylinders in this movement swinging the .pattern-carrier 11 on its hinge 9 to a position in which it bears flatwise against the under side of the plate 26, thus closing the gap between these parts. The operator then adjusts the clamps for holding the flask and bottom-board in position on the pattern plate. These clamps may be of any desirable construction, the ones shown are each formed of a U-shaped bar 46, on of the arms of which represented at 47 is longer than the other arm 48 thereof. The crossbar of the clamp which is the upper part of the clamp in Fig. 2, is of more or less resilient material in accordance with common practice. The arm 48 of each clamp is provided with a pin 49 adapted to enter any one of the notches 50 in a plate 51 secured to the side of the adjacent arm 10 of they pattern-carrier, as by bolts 52. The other arm 47 of each clamp is adapted to be clamped to the pattern-carrier through the medium of a set-screw 53 working in a lug 54 on the pattern-carrier 11.

The flask and bottom-board, having been clamped to the carrier as stated, the operator then operates the turn-over mechanism 18 for inverting the carrier and seating it upon the flask-rests 13, the mechanism hereinbefore described for locking the plate 26 to the pattern-carrier', automatically operating in the particular construction illustrated to perform this locking function during the said movement of the carrier.

It will be readily understood from the foregoing that inasmuch as the gap between the pattern-plate and carrier is destroyed before the clamps are applied, the flask and bottom-board will be rigidly held in position during the inversion of the flask to drawing position, and thus shifting of these parts, relative to each other will be avoided.

lVhile I have illustrated and described the particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto, as the same may be variously modified and altered without departing from the spirit of my invention. Furthermore, while I have shown my invention as applied to a machine of the marginallyhinged mold-drop type, it will be manifest that it may be used to advantage in other types of machines, and wherever the part carrying the pattern, previous to the turnover operation, is spaced from` the patterncarrier.

Vhat I claim as new and desire to secure by Letters Patent is 1. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member' above, and in spaced relation to, said pattern-carrier, means for moving said carrier into engagement with said member preliminary to the operation of inverting the carrier, and means for releasably securing said member to the carrier.

2. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, jarring mechanism supporting said member above, and in spaced relation to,

of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member', means supporting said member above, and spaced relation to, said pattern-carrier, power means for inverting said carrier, means for moving said carrier into engagement with said member preliminary to the operation of said power means, and means for releasably securing said member to the carrier.

at. In a molding machine, the combination of a pivotally-supported pattern-carrier adapted to be turned to inverted position, 'a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for turning said carrier to a predetermined position for engaging with said member, preliminary to the inverting of the pattern-carrier, and means for releasably securing said member to the carrier.

5. In a molding machine, the combination of a pivotally-supported pattern-carrier, a pattern-supporting member., means supporting said member above, and in spaced relation to, said pattern-carrier, power means Jfor inverting said carrier, means for turning said carrier to a predetermined lposition for engagement with said member', preliminary to the operation of said. power means, and means for releasably securing said member to the carrier.

6. In a molding machine, the combination of a marginally-hinged pattern-carrier, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for moving said carrier into engagement with said member preliminary to the operation of inverting the carrier, and means for releasably securing said member to the carrier.

7. In a molding machine, the combination of a marginally-hinged pattern-carrier, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, power means for inverting said carrier, means for moving said carrier into engagement with said member preliminary to `the operation of said power means, and means for releasa-bly securing said member to the carriera 8. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier', means for moving said carrier into engagement with said member preliminary to the adjustment of said flaskclamp to clamping position, means for releasably securing said member to the carrier, and a flask-clamp engaging said carrier.

9P 111 a molding machine, thecombnaton of a pattern-.carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for moving said carrier into engagement with said member preliminary to the operation of inverting the carrier to drawing position, means for releasably securing said member to the carrier, and a `flask-clamp engaging said carrier.

10. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, power means for invertingsaid carrier, means for turning said carrier into engagement with said member preliminary tothe operation of said power means, means for releasably secu-ring said member to the carrier, and a flask-clamp engaging said carrier.

11. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for releasably securing said member to the carrier, a iiaslclamp having a portion adapted to extend across the flask and with portions at opposite sides thereof adapted to engage said pattern-carrier, and means for moving said carrier into engagement with said member preliminary to the adjustment of said clamp to clamping position.

12. In a. molding machine, the combination of a pattern-carrier supported to be moved to inverted position, apattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for moving said carrier into engagement with said member preliminary to the operation of inverting the carrier, means for releasably securing said member to the carrier, and a flaskclamp having a portion adapted to extend across the flask and with portions at opposite sides thereof adapted to engage said pattern-carrier.

13. In a molding machine, the combination of a marginally-hinged pattern-carrier, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for releasably securing said member to the carrier, a flask-clamp having a portion adapted to extend across the ,flask and with portions at opposite sides thereof adapted to engage said pattern-carrier, power means for inverting said pattern-carrier, and means for turning said carrier a predetermined distance for engaging the latter with said member preliminary to the adjustment of said clamp and the operation of said power means.

14. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-sup porting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for releasably securing said member to the carrier, a flask-- clamp', having a central portion adapted to extend across the ask and having end-sections at angles thereto, adapted to engage at its end-sections With said pattern-carrier, and means for moving said carrier into engagement with said member preliminary to the adjustment of said clamp to clamping position.

15. In a molding machine, the combination of a pattern-carrier supported to be moved to inverted position, a pattern-supporting member, means supporting said member above, and in spaced relation to, said pattern-carrier, means for releasably securing said member to the carrier, flask- '5' clamping means formed of a member adapted to extend across the ask, means engaging said carrier for securing one end of said clamping-member to the carrier, and adjustable means on said carrier for engaging the member above, and in spaced relation to,

said pattern-carrier, means for releasably securing said member to the carrier, clamping means formed of a member adapted to extend across the flask, means adjustably connecting one end of said clamping mem ber to said carrier at one side of the flask, and adjustable means on said carrier at the opposite side of the flask for securing said clamping-member at its opposite end to said carrier, and means for moving said carrier mto engagement with sald patternsupporting member preliminary to the adjustmentv of said clamping means to clamping position.

EDWARD A. PRIDMORE.

In presence of- D. C. TH'oRsEN, 0.10. AvIsUs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

